Dr Julian Vigo writes in The Ecologist magazine how the massively negative environmental impact of meat production is largely ignored by the largest environmental charities, how the meat industry's "holy grail" of grass-fed beef is unsustainable as an option, and thus our best option is to become vegan.
Link to the full article on The Ecologist website:
https://theecologist.org/2018/jun/04/under-reported-ecological-disaster-meat